From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Comparison of maximum pressures on Big End Bearings for a 12 HP engine and a Bentley V engine.
| Identifier | ExFiles\Box 115\2\ scan0501 | |
| Date | 26th October 1939 | |
| -5- Rm{William Robotham - Chief Engineer}/TAS.{T. Allan Swinden}9/JH.26.10.39. BIG END BEARINGS. 12 H.P.4 cyl. B.V. Figures from By/B.6/G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 5.12.38. Max. pressure on 12 H.P. bearing at 4500 r.p.m. 1500 lb/in.2 " " " Bentley V " " 4250 r.p.m. 1750 lb/in.2 Rm{William Robotham - Chief Engineer}/TAS.{T. Allan Swinden} | ||